PTFE blend flat sheet membrane and preparation method thereof

A technology of PTFE and flat membrane, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. It can solve the problems of difficult preparation and poor processing performance of PTFE hollow fiber membranes, and achieves easy industrial implementation and stable physical properties of the membrane. , cheap effect

Inactive Publication Date: 2016-06-15
TIANJIN TIANSU SCI & TECH GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PTFE's "insoluble and infusible" characteristics make its processing performance very poor, and it is difficult to become an industrial membr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] A PTFE blended flat membrane. The PTFE blended membrane contains hydrochloric acid modified attapulgite, the mass ratio of PTFE to modified attapulgite is 1:0.01, and the particle size of the modified attapulgite is 1000 mesh.

Example Embodiment

[0036] Example 2

[0037] A PTFE blended flat membrane. The PTFE blended membrane contains hydrochloric acid modified attapulgite, the mass ratio of PTFE to the modified attapulgite is 1:0.15, and the particle size of the modified attapulgite is 300 mesh.

Example Embodiment

[0038] Example 3

[0039] A preparation method of PTFE blend flat membrane, the preparation process includes the following steps:

[0040] 1. Hydrochloric acid modified attapulgite

[0041] Take 300-1000 mesh attapulgite, wash with distilled water, precipitate and take the supernatant, centrifuge at low speed 400-800rpm for 0.5~2min, then precipitate and take the supernatant; then centrifuge at high speed 3000~5000rpm for 0.5~2min after separation, take the precipitate, precipitate Vacuum drying at 80~100℃ for 20~30h, after grinding, select 300-1000 mesh sieve according to the particle size to obtain purified attapulgite; add water and stir for purified attapulgite, add 10g~20g purified attapulgite 150mL~200mL with a concentration of 2.5mol / L~3mol / L hydrochloric acid, add hydrochloric acid, heat to 70~80℃, stir for 1h~2h, then ultrasonically shake for 30min~40min, suction filter, wash with distilled water to pH 5.5~6.5, Vacuum drying at 80-100°C for 20-30h, and grinding through a 3...

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Abstract

The invention relates to a PTFE blended flat film and a preparation method thereof. The invention belongs to the technical field of flat film. A PTFE blended flat film is characterized in that the PTFE blended flat film contains attapulgite. A kind of preparation method of PTFE blended flat film, it is characterized in that: the preparation process of PTFE blended flat film comprises the following steps: (1) prepare casting liquid: PTFE dispersion emulsion and PVA powder are dispersed and dissolved in deionized water, then Add modified attapulgite to make the mass ratio of PTFE to modified attapulgite 1:0.01~1:0.1, stir and ultrasonically disperse attapulgite to obtain casting liquid; (2) prepare PTFE/attapulgite Soil blend film: After scraping the film on a clean glass plate, solidify it in absolute ethanol to form a film, dry the obtained film and sinter it to obtain a PTFE/attapulgite blend film. The invention has the advantages of simple process, convenient operation, simple product components, readily available raw materials, low cost, convenient processing, wide application range, effective adsorption of heavy metal ions and the like.

Description

technical field [0001] The invention belongs to the technical field of flat membranes, in particular to a PTFE blended flat membrane and a preparation method thereof. Background technique [0002] At present, membrane separation technology has been widely researched and explored as a high-tech in the field of industrial wastewater treatment. Due to its high separation efficiency, no phase change, energy saving and environmental protection, simple equipment, easy operation, no secondary pollution, and easy separation of products The advantages of recycling and high degree of automation make it have considerable technical advantages in the field of water treatment, and it has become one of the indispensable technologies in the field of water treatment. [0003] Polytetrafluoroethylene (PTFE) has outstanding chemical stability and excellent high and low temperature performance, and has increasingly attracted the attention of membrane researchers, especially its good corrosion r...

Claims

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Application Information

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IPC IPC(8): B01D71/36B01D69/06B01D67/00B01J20/10B01J20/30C02F1/28C02F1/62
CPCB01D71/36B01D67/0011B01D67/0013B01D69/06B01D71/02B01J20/10B01J2220/4806C02F1/281C02F2101/20
Inventor 李培欣谢学民段连群梁李爽戴靖
Owner TIANJIN TIANSU SCI & TECH GROUP
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